A sexy summer weekend turns into a blood-soaked nightmare for a group of college students trapped on an island surrounded by voracious underwater predators in Shark Night 3D, a terrifying thrill ride from director David Ellis (The Final Destination, Snakes On a Plane), featuring a red-hot young cast including Sara Paxton (Superhero Movie, Last House on the Left), Dustin Milligan (“90210,” Slither), Chris Carmack (“The O.C.”), Joel David Moore (Avatar), Chris Zylka (The Amazing Spider Man) and Katharine McPhee (The House Bunny).